Clock



FIG. 1 is a top plan view of a clock showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a bottom plan view.

The ornamental design for a clock, as shown and described.